Music-leaf turner.



M.- L KEAGLE.-

MUSIC LEAF TURNER. 'APPLICTION FILED APR. 14, 1908.'

920,749, Patented May 4, 1909.

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MARTIN L. KEAGLE, OF PARSONS, TEST VIRGINIA.

MUSIC-LEAF TURNER.

Application iled April 14, 1908.

Specification of Letters Patent.

Patented May 4, 1909.

Serial No. 427,044.

The invention has t'or one ot' its objects to provide an apparatus ot' this character which is ot comparatively simple and inexgensivc c mstruction. thoroughly reliable and elicient in use. and convenir-idly manipulated.

Another object otl the invention is the provision ot a music leal turner coiisistinpA ot' a plurality ot swinging elements to which the leaves o tl the music to be turned are attached and which are turned at the proper time by tlie depression of a key by the music-ian. one key serving' to control at leasttwo oi the swinging elements that tnrn the leaves. so that the leaves will be turned by successively depressing the key.

lilith these objects in view and other", as will appear as the description proceeds, the invention comprises the various novel t'eatures of construction and arrangement oi' parts which will be more fully described hereinafter and set forth with particularity in the claims appended hereto.

In the accompanying drawing'. which illustrates one of the embodiments ot the invention, Figure l is a perspective view oit' the music lealu turner. Fig. 2 is a horizont-al section on line 2 2, F 8, showing the operating mechanism ot the apparatus. Fig. 3 is a vertical section on line 3 3, Fig'. Q. Fig. l is a section on line l +L, Fig. 2. Fig'. 5 is a perspective view of the device tor controlling the depression of the key tor successively turning the leaves.

Similar reference characters are employed to designate corresponding' parts throughout the several views.

Referring to thel drawing. 1 designates a music rest of any suitable construction which is provided at its middle with a casing 2 containing` the operating mechanism ot the apparatus. Rising from the casing' is a tixed post 3 on which the leaf-turning elements or arms elare adapted lo swine'. On the extremities of these arms are nprights 5 pivotally connected to the arms at (i so tha. they can fold down upon the latter' when the appa 'atus is not in use. and on these uprights are clasps T lor gripping the edges ot the leaves S ot the music.. ln the present instance, the arms l are made ot angle stock so that the bottom edges ot' the leaves will be engaged by the arms to move tl erewit-h.

The mechanism within the casing` 2 oomprises a plurality ot' arm-actimting elements S), i() and 1l, mounted to turn independently on the post as an axis. Each element is connected with a spiral spring l2 that has its inner ends rigidly secured to the post and which imparts power to move the leatturning arms et. On the said elements are lingers 9. 10 and ll, that have their extremities bent upwardly to extend through an arcuate slot 13 in the top ot the casing 2 and concentric with the post lach linger adapted to'eng'ag'e behind a` leaf-turning arm so as to swing' the latter when the musician depresses a key. rlhe finger El is controlled by a key lei that is pivoted at l5 in the rear of the casingl 2 and has its forward end projectingl out ot' the casing' through a slot i6. On this key is an ul)wardly-exteiiding' lugV or stop 1T behind which the linger 9 engages when the apparatus is set or in operating' position. rihe arms l0 and ll are controlled by a single key 1S disposed parallel to and adjacent the other key and provided with an abutment 19 to engage both fingers. Under the keys are arranged springs :2O for holdingI the levers in locking' position, and for returning the same alter being' depressed. The lever 1S is adapted to have two depression strokes oit different lengths, whereby the lingers l0 and il vill be successively released by successively depressing the key or lever. For this purpose, a stroke-limiting' device 2l is arranged in the casing' 2 directly under the key 1S, said device being' in the torni ot' a slide having' a stepped portion to provide surfaces 22 and at different levels. The device Q1 is connected by a pivot 2t with a lever 25 mounted on a fulcrum 2G and havingl its rear end formed into a yoke 27 that extends under the element ll so that its bifurcations 28 will be engaged by a pin Q9 on the said element, whereby the movement of the latter will oscillate the lever' 25. The movement of the device 2l is limited by a pin 30 fixed on the casing and extending into a longitudinal slot 31 of the member 21.

llVhen the parts are in the position shown in Figs. 2 to 11, inclusive, the music-turning arms are in set position and ready to turn the leaves. After the first two pages of music have been played, the musician depresses the lever 14E so as to release the finger 9', whereupon the latter is swung around on the post 3 by the expansion of the spring 12 and consequently carries the first musicturning arm l to the position shown in Fig. 1. Then the third and fourth pages have been played, the musician depresses the key 18, which is limited in its downward move- 5 ment by the higherl surface 23 of the device 21. This movement will be sufiicient to release the finger 11, so that its spring 12 will cause the second arm 4: to be turned. is the element 11 turns, the pin 29 engages the left bifurcation QS, Fig. 2, and causes the lever 25 to be moved in a direction to shift the device 21 and bring the lower surface 22 under the key 1S, thus automatically positioning the parts so that the next depression of the said key will release the finger 10, as when it is desired to turn the next leaf.

In placing the music in the apparatus, the leaves to be turned are attached to the res )ective arms b the cli )s 7 on the upri'lits ,3, and after being thus attached, the arms 4 are swung to the right intoset position, thus exposing the first and second pages of the music. is the arms 4 are turned to the right, the fingers 9, 10 and 1l are moved with them and these fingers engage the abutments 17 and 19 and cause the keys to be depressed until the fingers pass behind the abutments, whereupon the springs 20 will raise the keys so that the abutments will hold the fingers in set position. During this setting movement of the apparatus, the pin 29 on the element 11 engages the right bifurcation 28 of the lever 25 so as to remove the latter in a direction to restore the stroke-limiting device 21 for the key 1S. In the present instance, an apparatus is shown for turning' three leaves, but it is to be understood that the leaf turning elements may be multiplied to any desired extent and if preferred, only two leaf-turning elements controlled by a single key may be employed.

From the foregoing description, taken in connect-ion with the accompanying drawing, the advantages of the construction and of the method of operation will be readily apparent to those skilled in the art to which the invention appertains, and while I have described the principle of operation of the invention, together with the apparatus which Having thus described the invention, what claim is 1. ln an apparatus of the class described, the combination of a plurality of leaf-turning elements, spring-actuated members for moving the elements, a key for holding the members in set position, a device against which the key strikes when depressed for controlling the strokes of the key to release the members one at a time, and means actuated by one of the members for operating the said device.

:2, ln an apparatus of the class described, the combination of a post, swinging leafturning elements mounted thereon, swinging members on the post and arranged to turn the elements, a spring for each member, a key for holding the members in set position, and means arranged to limit the depression of the key whereby the successive strokes thereof are of dierent lengths to release the members one at a time.

3. lnan apparatus of the class described, the combination of a plurality of swinging leaf-turning elements, i ctuating members therefor, springs for actuating the members, a key arranged to hold the members in set position against the tension of their springs, a device for limiting the strokes of the key to release the members successively, a lever connected with the device for shifting the same, and means on one of the members for actuating the lever.

Ll. in a device of the class described, the combination of three leaf-turning elements, spring-actuated members one engaging each element to operate the same, two of the members being arranged one over the other, a depressible key provided with means for engaging both of the said members for releasing the same successively by depressing the key diderent distances, means arranged in cooperative relation with the key for controlling the lengths of the strokes thereof, a device for actuating the last-mentioned means by the movement of the first member, and an additional key for releasably holding the third member in set position.

In testimony whereof I affix my signature in presence of two witnesses.

lifARTlll L. KEAGLE.

llflitnesses Y WT. YV. BUnLnw, C. BnADwAY. 

